QS60StylePrivate leaks memory

QS60StylePrivate creates a QS60StyleAnimation object and appends it to m_animations (qs60style_s60.cpp, QS60StylePrivate::QS60StylePrivate()). It is never freed.

Because application-wide QMutexPool and all the mutexes in it are only freed when last QObject in application is deleted, and QS60StyleAnimation is a QObject, this issue contributes to a mutex leak (https://bugreports.qt.nokia.com/browse/QTBUG-13227).